STEP Sewer Project
The STEP Link Sewer Contracts LS01 and LS02 transfer wastewater a distance of 40km through a network of micro-tunnels, with diameters ranging from 200mm to 2800mm, from Saatiyat Island to an area in Al Raha beach. The very deep micro-tunnelling works involved the construction of over 300 shafts at depths of up to 35m.
ByrneLooby provided geotechnical design and specialist services to the Design & Build Contractor, Ed Zublin AG for this mega project in Abu Dhabi, UAE. Our role included the planning and supervision of detailed ground investigations, planning geotechnical instrumentation for monitoring ground movement and groundwater change during shaft construction and tunnelling operations. Our scope also included the design of over 300 temporary shafts at depths up to 35m in a constrained urban environment.